National Museum of Nuclear Science & History
Joseph Caldwell was a security guard at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Brommer worked at Los Alamos during the Manhattan Project.
Joe Dykstra graduated from college in 1943 with a degree in chemistry. He went to Niagara Falls, where he worked for the Hooker Electrochemical Company, producing fluorine cells for Oak Ridge.